About the Authors
- Chunfang Qiu
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* E-mail: Chun-fang.Qiu@Swedish.org
Affiliation Center for Perinatal Studies, Swedish Medical Center, Seattle, Washington, United States of America
- Karin Hevner
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Affiliation Center for Perinatal Studies, Swedish Medical Center, Seattle, Washington, United States of America
- Daniel A. Enquobahrie
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Affiliations Center for Perinatal Studies, Swedish Medical Center, Seattle, Washington, United States of America, Department of Epidemiology, University of Washington School of Public Health, Seattle, Washington, United States of America
- Michelle A. Williams
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Affiliations Center for Perinatal Studies, Swedish Medical Center, Seattle, Washington, United States of America, Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: CFQ MAW. Performed the experiments: KH. Analyzed the data: CFQ MAW. Contributed reagents/materials/analysis tools: MAW KH. Wrote the paper: CFQ KH DAE MAW.